Assessment of organic constituents in sewage sludge

Abstract

A standardized evaluation concept based on human toxicity, ecotoxicity and soil related data has been developed for the assessment of pollutants in sewage sludge. This assessment concept for different compounds is applicable using evaluation steps that are comparable and transparent based on a classification system. All compounds assessed here were assigned to three groups: pollutants of primary relevance, pollutants of secondary relevance and such, on which more information is necessary for evaluation. For the purpose of comparing the evaluation concept with results from some investigations under field and laboratory conditions degradation, sorption, retardation and plant transfer data for LAS are presented and discussed.